<template>
  <div>
    <el-input placeholder="请选择" :disabled="disabled" :size="size" :readonly="true" style="line-hight: 40px"
      v-model="name" class="input-with-select">
      <el-button slot="append" :disabled="disabled" @click="showSelectDialog" icon="el-icon-search"></el-button>
    </el-input>
    <el-dialog :title="title" :close-on-click-modal="false" :append-to-body="true" v-dialogDrag :visible.sync="visible">
      <el-row :gutter="15">
        <el-col :span="19">
          <el-form :inline="true" ref="searchForm" class="query-form" @keyup.enter.native="refreshList()"
            @submit.native.prevent>
            <el-form-item v-for="(search, index) in searchs" :key="index" :prop="search.prop">
              <el-input size="small" v-model="searchForms[index]" :placeholder="search.label" clearable></el-input>
            </el-form-item>
            <el-form-item>
              <el-button type="primary" @click="refreshList()" size="small">查询</el-button>
              <el-button @click="resetSearch()" size="small">重置</el-button>
            </el-form-item>
          </el-form>
          <el-table :data="dataList" v-loading="loading" border size="medium" ref="userTable"
            @selection-change="selectionChangeHandle" @sort-change="sortChangeHandle" style="width: 100%">
            <el-table-column type="selection" header-align="center" align="center" width="50">
            </el-table-column>
            <template v-for="(column, index) in columns">
              <el-table-column :key="index" :prop="column.prop" header-align="center" align="center" min-width="100px"
                :label="column.label">
              </el-table-column>
            </template>
          </el-table>
          <el-pagination @size-change="sizeChangeHandle" @current-change="currentChangeHandle" :current-page="pageNo"
            :page-sizes="[5, 10, 50, 100]" :page-size="pageSize" :total="total"
            layout="total, sizes, prev, pager, next, jumper">
          </el-pagination>
        </el-col>
        <el-col :span="5">
          <el-tag :key="tag.id" v-for="tag in dataListAllSelections" closable :disable-transitions="false"
            @close="del(tag)">
            {{ tag[labelName] }}
          </el-tag>
        </el-col>
      </el-row>
      <span slot="footer" class="dialog-footer">
        <el-button @click="visible = false">关闭</el-button>
        <el-button type="primary" @click="doSubmit()">确定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        searchForms: [],
        filterText: "",
        dataListAllSelections: [], // 所有选中的数据包含跨页数据
        dataListSelections: [],
        idKey: "id", // 标识列表数据中每一行的唯一键的名称(需要按自己的数据改一下)
        dataList: [],
        dynamicTags: [],
        selectData: [],
        pageNo: 1,
        pageSize: 5,
        total: 0,
        orderBy: "",
        loading: false,
        visible: false,
        name: "",
      };
    },
    props: {
      limit: {
        type: Number,
        default: 999999,
      },
      columns: {
        type: Array,
        default: () => {
          return [];
        },
      },
      disabled: {
        type: Boolean,
        default: false,
      },
      searchs: {
        type: Array,
        default: () => {
          return [];
        },
      },
      dataListUrl: {
        type: String,
        default: () => {
          return null;
        },
      },
      queryEntityUrl: {
        type: String,
        default: () => {
          return null;
        },
      },
      entityBeanName: {
        type: String,
        default: () => {
          return null;
        },
      },
      value: {
        type: String,
        default: () => {
          return null;
        },
      },
      title: {
        type: String,
        default: () => {
          return "";
        },
      },
      labelName: {
        type: String,
        default: () => {
          return "";
        },
      },
      labelValue: {
        type: String,
        default: () => {
          return "";
        },
      },
      size: {
        type: String,
        default: () => {
          return "default";
        },
      },
    },
    watch: {
      value: {
        handler(newVal) {
          this.selectData = [];
          if (newVal) {
            newVal.split(",").forEach((value) => {
              if (value) {
                this.$http
                  .get(`${this.queryEntityUrl}?${this.labelValue}=${value}`)
                  .then(({ data }) => {
                    if (data[this.entityBeanName][this.labelValue] !== "") {
                      this.selectData.push(data[this.entityBeanName]);
                    }
                  });
              }
            });
          }
        },
        immediate: true,
        deep: false,
      },
      selectData: {
        handler(newVal) {
          this.dataListAllSelections = JSON.parse(
            JSON.stringify(this.selectData)
          );
          this.name = this.dataListAllSelections
            .map((item) => {
              return item[this.labelName];
            })
            .join(",");
        },
        immediate: false,
        deep: false,
      },
    },
    methods: {
      init() {
        this.visible = true;
        this.$nextTick(() => {
          this.resetSearch();
        });
      },
      // 设置选中的方法
      setSelectRow() {
        if (
          !this.dataListAllSelections ||
          this.dataListAllSelections.length <= 0
        ) {
          this.$refs.userTable.clearSelection();
          return;
        }
        // 标识当前行的唯一键的名称
        let idKey = this.idKey;
        let selectAllIds = [];
        this.dataListAllSelections.forEach((row) => {
          selectAllIds.push(row[idKey]);
        });
        this.$refs.userTable.clearSelection();
        for (var i = 0; i < this.dataList.length; i++) {
          if (selectAllIds.indexOf(this.dataList[i][idKey]) >= 0) {
            // 设置选中，记住table组件需要使用ref="table"
            this.$refs.userTable.toggleRowSelection(this.dataList[i], true);
          }
        }
      },
      // 记忆选择核心方法
      changePageCoreRecordData() {
        // 标识当前行的唯一键的名称
        let idKey = this.idKey;
        let that = this;
        // 如果总记忆中还没有选择的数据，那么就直接取当前页选中的数据，不需要后面一系列计算
        if (this.dataListAllSelections.length <= 0) {
          this.dataListSelections.forEach((row) => {
            that.dataListAllSelections.push(row);
          });
          return;
        }
        // 总选择里面的key集合
        let selectAllIds = [];
        this.dataListAllSelections.forEach((row) => {
          selectAllIds.push(row[idKey]);
        });
        let selectIds = [];
        // 获取当前页选中的id
        this.dataListSelections.forEach((row) => {
          selectIds.push(row[idKey]);
          // 如果总选择里面不包含当前页选中的数据，那么就加入到总选择集合里
          if (selectAllIds.indexOf(row[idKey]) < 0) {
            that.dataListAllSelections.push(row);
          }
        });
        let noSelectIds = [];
        // 得到当前页没有选中的id
        this.dataList.forEach((row) => {
          if (selectIds.indexOf(row[idKey]) < 0) {
            noSelectIds.push(row[idKey]);
          }
        });
        noSelectIds.forEach((id) => {
          if (selectAllIds.indexOf(id) >= 0) {
            for (let i = 0; i < that.dataListAllSelections.length; i++) {
              if (that.dataListAllSelections[i][idKey] === id) {
                // 如果总选择中有未被选中的，那么就删除这条
                that.dataListAllSelections.splice(i, 1);
                break;
              }
            }
          }
        });
      },
      // 得到选中的所有数据
      getAllSelectionData() {
        // 再执行一次记忆勾选数据匹配，目的是为了在当前页操作勾选后直接获取选中数据
        this.changePageCoreRecordData();
      },
      filterNode(value, data) {
        if (!value) return true;
        return data.name.indexOf(value) !== -1;
      },
      del(tag) {
        this.dataListAllSelections.splice(
          this.dataListAllSelections.indexOf(tag),
          1
        );
        this.$nextTick(() => {
          this.setSelectRow();
        });
      },
      // 获取数据列表
      refreshList() {
        this.loading = true;
        let searchForm = {};
        this.searchs.forEach((search, index) => {
          searchForm[search.prop] = this.searchForms[index];
        });
        this.$http({
          url: this.dataListUrl,
          method: "get",
          params: {
            pageNo: this.pageNo,
            pageSize: this.pageSize,
            orderBy: this.orderBy,
            ...searchForm,
          },
        }).then(({ data }) => {
          if (data && data.success) {
            data.page.list.forEach((e) => {
              if (e.hasOwnProperty("delFlags")) {
                if (e.delFlags == 0) {
                  e.delFlags = "正常";
                } else if (e.delFlags == 1) {
                  e.delFlags = "注销";
                }
              }
            });
            this.dataList = data.page.list;
            this.total = data.page.count;
            this.loading = false;
          }
          this.$nextTick(() => {
            this.setSelectRow();
          });
        });
      },
      // 每页数
      sizeChangeHandle(val) {
        this.pageSize = val;
        this.pageNo = 1;
        this.refreshList();
        this.$nextTick(() => {
          this.changePageCoreRecordData();
        });
      },
      // 当前页
      currentChangeHandle(val) {
        this.pageNo = val;
        this.refreshList();
        this.$nextTick(() => {
          this.changePageCoreRecordData();
        });
      },
      // 多选
      selectionChangeHandle(val) {
        this.dataListSelections = val;
        this.$nextTick(() => {
          this.changePageCoreRecordData();
        });
      },
      // 排序
      sortChangeHandle(obj) {
        if (obj.order === "ascending") {
          this.orderBy = obj.prop + " asc";
        } else if (obj.order === "descending") {
          this.orderBy = obj.prop + " desc";
        } else {
          this.orderBy = "";
        }
        this.refreshList();
      },
      resetSearch() {
        this.$refs.searchForm.resetFields();
        this.searchForms = [];
        this.refreshList();
      },
      doSubmit() {
        if (this.limit < this.dataListAllSelections.length) {
          this.$message.error(`你最多只能选择${this.limit}条数据`);
          return;
        }
        this.visible = false
        this.name = this.dataListSelections.map((item) => {
          return item[this.labelName]
        }).join(',')
        let value = this.dataListSelections.map((item) => {
          return item[this.labelValue]
        }).join(',')
        console.log('选择的信息：',value,this.dataListSelections);
        this.$emit('getValue', value,this.dataListSelections)
      },
      showSelectDialog() {
        this.visible = true;
        this.init();
      },
    },
  };
</script>